#变量声明

num1 = 2018
print (num1)

num2 = 3.   #等价于 num2 = 3.0
num3 = .5   #等价于 num3 = 0.5

print (num2,num3)

num4 = 1.6e5
num5 = 3.2e-3
print (num4,num5)

str1 = 'hello'
str2 = "world"
str3 = "你好,\n 世界"
str4 = "hello,\
  world"
str5 = '''
你好,
世界
'''
print (str1)
print (str2)
print (str3)
print (str4)
print (str5)
